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Anyone want to venture an opinion as to why reducing brace height as much as an inch would cause arrows to show weaker?
Does this really work this way, and if so how? I played around with centershot and couldn't make the arrow act differently. Since spine is really arrow vibration the amount of bend in the arrow doesn't change the frequency, at least that's the theory.Reducing brace hight moves your arrow tip further out from center and should produce a stiffer acting shaft.
". . . change how the arrow reacts. As in your case weak." I'm down with less forgiveness and a louder bow, but the "weak" part seems the opposite result to expect from that change. Maybe it's the false read that a couple of folks suggested up a few comments?When you shorten brace height you increase speed of the bow. It all has to do with the power stroke . An (example) would be a bow with a 9" brace height and 28" draw would have a 19" power stroke. Versus the same bow set to an 8" brace height would have 20" inches of power stroke. More power stroke equates to a higher fps due to more energy being put into the arrow. The down side maybe less forgiveness, a louder bow, and it will change how the arrow reacts. As in your case weak
Hope this helps
Mike
MatDoes this really work this way, and if so how? I played around with centershot and couldn't make the arrow act differently. Since spine is really arrow vibration the amount of bend in the arrow doesn't change the frequency, at least that's the theory.
Lowering the brace height reduces the amount of time the arrow is free from the string to do its own thing which affects spine too?
". . . change how the arrow reacts. As in your case weak." I'm down with less forgiveness and a louder bow, but the "weak" part seems the opposite result to expect from that change. Maybe it's the false read that a couple of folks suggested up a few comments?
Cool - if your happy with your tune WRITE IT DOWN !!!!!!Well, I appreciate all responses and olddogrib's take on the lack of consensus. Actually, changed shelf and strike plate surfaces last night after noticing some degrading of the shelf surface. Realized that in doing so I had effectively moved the strike plate out a little, so I wanted to shoot same arrows with same brace height today and compare results. Sure enough, arrows that showed a little weak yesterday showed right on/ever so slightly stiff today through paper. After shooting those down range a few minutes ago they really fly and impact straight when I do my part. So stopping right here for now. Again, thanks for all responses.
Like I said the arrow is what it is. But EVERYTHING we do affects how the arrow actually behaves. Shoot a self bow that effectively has absolutely no centershot whatsoever. You'll rethink the relationship between center shot and spine for sure.The center shot does not matter to spine, and since I don't have sights I don't have a good measure of impact changes.
I bought the iphone app appitune by Jake kaminski yesterday. None of the pieces were new to me but his process of tuning is interesting. In coming to a full tune he bare shafts, walk back tunes and group tunes but, he never mentions paper tuning.
Matt
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